{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["concept or principle", "process parameter", "machanical property", "material", "process characterization", "engineering feature"], "input": "Electron Beam Melting is a powder process which distinguishes by its superior accuracy and high-power electron beam ( up to 3000 W while maintaining a scan speed ) that generates the energy needed for high melting capacity and high productivity ."}
{"concept or principle": ["electron beam", "melting capacity", "productivity"], "process parameter": ["scan speed"], "machanical property": [], "material": [], "process characterization": ["accuracy"], "engineering feature": []}